The Saab manifold is being used to replace the LSJ manifold to eliminate the laminova tubes, so a A2A or A2W intercooler can be used. This manifold will not work on a LNF, due the direct injection system and the different intake inlet profile.
The exhaust manifold from the Saab turbo is similar to the LNF manifold and is a good bolt-on for the LSJ when doing the turbo upgrade. There is no benefit to this manifold on the LNF.